Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886859 | Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use | Heinrich Hartmann, Ulrich Gockel, Felix Richter, Hans-Jurgen Raubenheimer, Ekhard Winkler | 1989-12-12 |
| 4880497 | Preparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paper | Sigberg Pfohl, Michael Kroener, Heinrich Hartmann | 1989-11-14 |
| 4818794 | Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use | Heinrich Hartmann, Ulrich Goeckel, Felix Richter, Hans-Juergen Raubenheimer, Ekhard Winkler | 1989-04-04 |
| 4818795 | Polymaleic acid, its preparation and its use | Heinrich Hartmann, Ulrich Goeckel, Felix Richter, Ekhard Winkler, Hans-Juergen Raubenheimer | 1989-04-04 |
| 4816534 | Preparation of vinylpyrrolidone polymers | Adolf Nuber, Axel Sanner | 1989-03-28 |
| 4814102 | Detergents containing oxyalkylated, carboxyl-containing polymers | Richard Baur, Albrecht Eckell, Heinrich Hartmann, Josef Mueller, Hans-Juergen Raubenheimer +1 more | 1989-03-21 |